Eastern Technologies Holding Limited

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Grand Cayman, KY

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Patents Grantslast 30 patents

Information Patent Grant
Treble and bass headphone structure
- Patent number 9,124,976
- Issue date Sep 1, 2015
- EASTERN TECHNOLOGIES HOLDING LIMITED
- Ming-Chung Chu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Earphone with tension diaphragm
- Patent number 8,744,111
- Issue date Jun 3, 2014
- Eastern Technologies Holding Limited
- Ming-Chung Chu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Negative pressure earphone
- Patent number 8,737,665
- Issue date May 27, 2014
- Eastern Technologies Holding Limited
- Chu Ming Chung
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Reverse-direction co-axial earphone
- Patent number 8,588,453
- Issue date Nov 19, 2013
- Eastern Technologies Holding Limited
- Pin-Tang Lee
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
TREBLE AND BASS HEADPHONE STRUCTURE
- Publication number 20150208160
- Publication date Jul 23, 2015
- Eastern Technologies Holding Limited
- Ming-Chung CHU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SIMULATED SOUND FIELD EARPHONE
- Publication number 20140072153
- Publication date Mar 13, 2014
- Eastern Technologies Holding Limited
- Chu Ming Chung
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
EARPHONE WITH TENSION DIAPHRAGM
- Publication number 20140064548
- Publication date Mar 6, 2014
- Eastern Technologies Holding Limited
- Ming-Chung CHU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Negative pressure earphone
- Publication number 20130259286
- Publication date Oct 3, 2013
- Eastern Technologies Holding Limited
- Chu Ming Chung
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Trademarklast 30 trademarks